Indicator for elevators



(No Model.)

R. F. OARTWRIGHT.

INDICATOR FOR ELEVATORS.

No. 391,355. Patented Oct. 16,1882}.

WITNESSES: INVENTOR- @MJ %WJMM BY MATTORNEY,

N4 PETERS, Fholo-Lnhognphar, Wnhingtcn. n. C,

UNITED STATES PATENT OFFICE.

ROBERT F. OARTWRIGHT, OF BROOKLYN, NEIV YORK.

INDICATOR FOR ELEVATORS.

SPECIFICATION forming part. of Letters Patent No. 391,355, dated October 16, 1888.

Serial No. 276,5?36. (No model.)

,To all whom it may concern.-

Be itknown that LRonER'r F. CARTWRIGHT, a subject of Her Majesty the Queen of Great Britain, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Indicators for Passenger and Freight Elevators, of which the following is a specification.

The. invention relates to improvements in indicators for passenggr and freight elevators; and it consists in a novel arrangement of devices actuated by the sheaveshaft at the top of the building, whereby the position of the carriage with respect to the different floors may be accurately denoted.

The invention consists, further, in novel means for resetting the indicating mechanism at the end of each trip of the carriage should the same become disarranged or altered on account of any slip of the gearing consequent upon the sudden stopping and starting of the carnage.

The invention will be more fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which- Figure 1 is a front view, partly in section, of the gearing at the top of the building. Fig. 2 is a side elevation, partly in section,of same. Fig. 3 is a horizontal section onthe dotted line a I) of Fig. 2. Fig. 4 is aface view of the dial with its index-finger and connecting mechanism. Fig. 5 is an edge view of the pulleys sustained on a plate at each floor of the building for use in connection with the index-finger provided,also, at each floor of the building, and Fig. 6 is a vertical section on the dotted line 0 d of Fig. 4.

In the drawings, A designates the drivingshaft at the top of the building, and B the main pulley-wheel thereon. In one end of the shaft A is rigidly affixed the end of the worm D,which engages the worm-pinion E,mounted on the shaft F, suitably journaled in boxes G G at the upper portion of the casting or frame H. One end of the shaft F extends beyond the frame H, as shown in Fig. 1, and upon this extended portion is mounted the wheel I and disks J J, the latter being keyed on the shaft and the former being loose on the shaft and between the disks J J. On each side of the wheel I are provided disks L,0f leather or other suitable material, and these, with the wheel and disks J J, are firmlybound together by the pressure of the nut M on the threaded end of the shaft F. The wheel I is grooved on its periphery-t0 receive the chain N, and is provided on one side with the lugs 1? Q, as shown by full lines in Fig. 1 and by dotted lines in Fig. 2, in which lugs are arranged the transverse adjusting-screws R. The lugs Q P, carrying the screws R, extend over the periphery of the adjacent disk J in position to come into contact with the lugS when necessary, as hereinafter described, this lug being bolted to the frame H. The chain N is secured at one end "by a rivet, e, to the wheel I, whence it passes over the top of the wheel and then extends downward into the elevator-shaft a short distance, where it is coupled with the upper end of the rod or tube T, which passes downward to a point shortly above the bottom of the-elevatorshaft. The rod or tube T hangs close to the wall of the shaft, so as not to interfere with the regular operation of the carriage, and is guided in the lugs V, cast on plates W, one of which is secured to the wall of the shaft at each floor of the building about on a line with the upper end of the usual door provided for entrance to the carriage. Upon the plates IV are also provided the grooved Wheels X X, adapted to revolve on their axles and receive the section of small cable Y, as shown in Figs. 4 and 5, the ends of the cable being secured to the arms Z Z, affixed on the tube T a suitable distance above and below the lug V. From the upper arm Z the cable passes downward and around a portion of the upper pulley X, thence over and around the grooved wheel j, from which it passes to and around the lower wheel X, and has its end secured to the lower arm Z, as clearly indicated in Fig. 4.

At each floor of the building, as above explained, will be provided a plate, \V, and each of these plates will carry the wheels X X in order that a cable, Y, may be arranged for connection with an indicator at each floor. The wheel f, above referred to, is mounted on a shaft, 9, which extends forward through the usual frame above the customary elevatordoor and has upon its front end the indexfinger h, which is adapted to travel forward and backward in the line of a halfcircle, its

point moving close against the semicircular plate 1;, bearing numeralsindicative of the various floors of the building, and being secured directly over the usual elevator-doors at each floor, where it may be very readily observed and not mar the appearance of the surrounding surfaces.

The operation of the invention may probably be more clearly understood if Figs. 1 and 4 are considered as one connected view and Figs. 2 and 5 as another connected View, it being remembered that the plate W, wheels X, cable Y, index h, and plate 1' are duplicated at' each floor of the building. The shaft A and wheel B being in motion, the worm D will cause the pinion E and shaft F to slowly revolve,whereby motion is imparted to the disks J J and wheel I, and this latter when revolving will either draw the chain N and rod or tube T upward or permit them to lower, according to the direction of its motion, the wheel winding the chain upon itself when turning in one direction and unwinding the same when actuated in the opposite direction. The vertical movement of the rod or tube T operates through the cable Y and wheel f to move the index-fi nger it along the dial-plate t, the point of the finger passing along the figures on the dial-plate as the elevator-carriage moves from floor to floor of the building on its ascent or descent.

In the operation of the apparatus the Wheel I only makes a partial revolution, its line of travel on each side of the lug S being from its lug P to its lug Q. The adjustment of the parts is such that from the time the lug P leaves and the lugQ reaches the lug S, or vice versa, the index-finger It will be caused to make one complete movement along the dialplate 6, andduring its travel will indicate the position of the elevator-carriage. The move ment of the wheel I is regulatedwith relation to that of the main wheel B in order that upon one complete ascent or descent of the elevatorcarriage the said wheel I and the index-finger It may make one full movement. If, owing to any increased momenturn-such as is caused sometimes by a too sudden stopping or starting of the elevator-carriagethe index-finger should be jerked ahead of its proper numeral on the dial, and thus be made to register in accurately, this will be corrected and the said finger reset at the end of the movement of the carriage by either the lug For the lug Q (according to the direction of travel) coming into contact with the lug S and holding the Wheel I stationary while the disks J J and shaft F continue their movement.

When the wheel I is stopped, as aforesaid, by the lug P or Q striking the lug S, the chain N will cease to move and the indexfinger It will be held on either the last or first figure of the dial-plate 11 until the elevatorcarriage has finished its movement, whereupon the carriage, index-finger, and dial will again register and will remain in proper time with each other until some inadvertence again occurs to disarrange them. The indexfinger is thus automatically set at each end of the movement of the elevator-carriage when ever anything occurs to render this necessary. If the wheel I should be jerked too far ahead in any particular part of its movement, it will be checked at the end of its movement, the lugs P and Q absolutely preventingit from traveling more than a definite prescribed distance. If, owing to any stretching of the cables, it would be desirable to alter travel of the Wheel I, this can be accomplished by adjusting the screwsR in the lugs P Q, the point of these screws being the contact-points of the lugs with the lug S.

The wheel I is tightly clamped between the leather disks L and disks J J, and will move with the same, except at such time as their pressure is overcome by the lug Q or P coming into contact with the lug S.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In indicating apparatus for elevators, the rod T and a chain and wheel for raising or lowering the same, combined with the wheels X and f, the cable passing over said wheels and connected at its ends with the said rod, the dial bearing indicating characters, and the index-finger on the axle of wheelf, substantially as set forth.

2. In indicating apparatus for elevators, the rod T and mechanism, substantially as described, for raising and lowering the same, combined with the plate secured at each floor of the building and carrying guides for said rod, the wheels X and f, the cable connected at its ends with the arms Z on said rod and at its middle portions passing over the said Wheels, the dial 1;, and the index-finger h on the axle of wheel f, substantially as set forth.

3. The sheave shaft A, and the worm, Wor|n-pinion, and pinion-shaft in connection therewith, combined with the disks J J, keyed on the pinion-shaft, the wheel I and disks L between said disks J J, lugs P Q on said Wheel, the lug S, and the chain N, connected at one end with the wheel I and at the otherwheel and at the other with the elevatorindicating mechanism located at the various floors of the building, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 5th day of June, A. D. 1888.

ROBERT F. OARTXVRIGIIT. Vitncsses:

HERMAN GUSTOW, CHAS. G. GILL. 

